WWW! this brings back memories of working in daycare. we used to make these and we called them "Boo-Boo Bunnies" because when one of the kids bumped their head, we skipped an ice cube in the body of the bunny. it held it perfectly and as the ice melted, the towel would absorb the water. it lasted a long time and the kids always felt better if they could use the Boo-Boo bunny.